1/* $NetBSD: kgdb_glue.c,v 1.2 2007/10/17 19:56:43 garbled Exp $ */ 2 3/* 4 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 5 * Copyright (C) 1995, 1996 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34#include <sys/cdefs.h> 35__KERNEL_RCSID(0, "$NetBSD: kgdb_glue.c,v 1.2 2007/10/17 19:56:43 garbled Exp $"); 36 37#include <sys/param.h> 38 39#include <kgdb/kgdb.h> 40 41#include <machine/frame.h> 42#include <machine/kgdb.h> 43#include <machine/pcb.h> 44#include <machine/psl.h> 45#include <machine/trap.h> 46 47int kgdbregs[NREG]; 48 49#ifdef KGDBUSERHACK 50int kgdbsr; /* TEMPRORARY (Really needs some better mechanism) XXX */ 51int savesr; 52#endif 53 54void 55kgdbinit(void) 56{ 57} 58 59int 60kgdb_poll(void) 61{ 62 /* for now: */ 63 return 0; 64} 65 66int 67kgdb_trap_glue(struct trapframe *frame) 68{ 69 if (!(frame->srr1 & PSL_PR) 70 && (frame->exc == EXC_TRC 71 || (frame->exc == EXC_PGM 72 && (frame->srr1 & 0x20000)) 73 || frame->exc == EXC_BPT)) { 74#ifdef KGDBUSERHACK 75 __asm ("mfsr %0,%1" : "=r"(savesr) : "K"(USER_SR)); /* see above XXX */ 76#endif 77 kgdbcopy(frame, kgdbregs, sizeof kgdbregs); 78 kgdbregs[MSR] &= ~PSL_BE; 79 80 switch (kgdbcmds()) { 81 case 2: 82 case 0: 83 kgdbregs[MSR] &= ~PSL_SE; 84 break; 85 case 1: 86 kgdbregs[MSR] |= PSL_SE; 87 break; 88 } 89 kgdbcopy(kgdbregs, frame, sizeof kgdbregs); 90#ifdef KGDBUSERHACK 91 __asm ("mtsr %0,%1; isync" :: "K"(USER_SR), "r"(savesr)); 92#endif 93 return 1; 94 } 95 return 0; 96} 97